Synthesis and photocatalytic degradation ability evaluation for rhodamine B of ZnO@SiO2 composite with flower-like structure

ZnO@SiO₂ composite with flower-like structure was successfully prepared with molar ratio of ZnO/SiO₂ = 1:1 based on the optimized synthesizing parameters of spherical SiO₂ and flower-like ZnO. SiO₂ particles were coated on the flower-like ZnO to form a homogeneous film through the multidimensional polycondensation of Si(OH)₄. The photocatalytic degradation ability of ZnO@SiO₂ composite for rhodamine B (RhB) obtained at different ZnO/SiO₂ molar ratio and the comparison to that of flower-like ZnO showed that ZnO@SiO₂ composite with ZnO/SiO₂ molar ratio of 1:1 displayed a relatively good photocatalytic degradation ability to degrade RhB, but it was weaker than that of flower-like ZnO. Twenty millilitres of RhB solution at a concentration of 15 mg·L^-1 could be completely degraded by 300 mg flower-like ZnO powder within 3 h, while the degrading efficiency was only 82.5% by 300 mg ZnO@SiO₂ composite. But ZnO@SiO₂ composite showed a better photocatalytic activity than flower-like ZnO at a lower pH value of 4.5.

Ru(ii)-Metal complex immobilized mesoporous SBA-15 hybrid for visible light induced photooxidation of chlorophenolic compounds in aqueous medium

The work focuses on room-temperature photocatalytic degradation of phenolic compounds by Ru(ii)-complex immobilized mesoporous silica SBA-15 under visible light in an aqueous medium.

Synthesis, growth mechanism, optical properties and catalytic activity of ZnO microcrystals obtained via hydrothermal processing

Herein we describe ZnO microcrystals obtainedviahydrothermal processing at 120, 150 and 180 °C, assisted by CTAB.

The effect of ionic Co presence on the structural, optical and photocatalytic properties of modified cobalt–titanate nanotubes

With the aim of producing materials with enhanced optical and photocatalytic properties, titanate nanotubes (TNTs) modified by cobalt doping (Co-TNT) and by Na⁺ → Co ion-exchange (TNT/Co) were successfully prepared by a hydrothermal method.

Microstructure, growth process and enhanced photocatalytic activity of flower-like ZnO particles

A simple hydrothermal process was developed to synthesize flower-like ZnO microstructures that exhibited excellent photocatalytic activity.

Utilization of Ru(ii)-complex immobilized ZnO hybrid in presence of Pt(ii) co-catalyst for photocatalytic reduction of 4-nitrophenol under visible light

In the present study, an attempt has been made to utilize a Ru(ii)-complex-sensitized ZnO hybrid along with a Pt(ii) salt for the visible light aided photoreduction of 4-nitrophenol.

Ultra-rapid formation of ZnO hierarchical structures from dilution-induced supersaturated solutions

ZnO hierarchical structures assembled by tunable nanoscale building blocks such as nanorods, nanosheets and nanoparticles were synthesized from dilution-induced supersaturated solutions.